package org.csu.mypetstore.persistence;

import java.sql.*;
//数据库驱动、连接、关闭
public class DBUtil {
    private static final String driverString = "com.mysql.cj.jdbc.Driver";
    private static final String connectionString = "jdbc:mysql://127.0.0.1:3306/jpetstore?&useSSL=false&serverTimezone=UTC&allowPublicKeyRetrieval=true";
    private static final String username = "root";
    private static final String password = "19950827";

    public static Connection getConnection() throws Exception {
        Connection connection = null;
        try {
            Class.forName(driverString);
            connection = DriverManager.getConnection(connectionString, username, password);
        } catch (Exception e) {
            throw e;
        }
        return connection;
    }

    public static void closeStatement(Statement statement) throws Exception {
        statement.close();
    }

    public static void closePreparedStatement(PreparedStatement pStatement)
            throws Exception {
        pStatement.close();
    }

    public static void closeResultSet(ResultSet resultSet) throws Exception {
        resultSet.close();
    }

    public static void closeConnection(Connection connection) throws Exception {
        connection.close();
    }

    	// test the db connection
//	public static void main(String[] args) throws Exception {
//		Connection conn = DBUtil.getConnection();
//		System.out.println(conn);
//	}

}